EP0175579B1 - Elektronenrechner - Google Patents

Elektronenrechner Download PDF

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Publication number
EP0175579B1
EP0175579B1 EP85306652A EP85306652A EP0175579B1 EP 0175579 B1 EP0175579 B1 EP 0175579B1 EP 85306652 A EP85306652 A EP 85306652A EP 85306652 A EP85306652 A EP 85306652A EP 0175579 B1 EP0175579 B1 EP 0175579B1
Authority
EP
European Patent Office
Prior art keywords
input
display
character
numerical
formula
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP85306652A
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English (en)
French (fr)
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EP0175579A3 (en
EP0175579A2 (de
Inventor
Naoki Shiraishi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sharp Corp
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Sharp Corp
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Publication of EP0175579A2 publication Critical patent/EP0175579A2/de
Publication of EP0175579A3 publication Critical patent/EP0175579A3/en
Application granted granted Critical
Publication of EP0175579B1 publication Critical patent/EP0175579B1/de
Anticipated expiration legal-status Critical
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F15/00—Digital computers in general; Data processing equipment in general
    • G06F15/02—Digital computers in general; Data processing equipment in general manually operated with input through keyboard and computation using a built-in program, e.g. pocket calculators

Definitions

  • the present invention relates to an electronic computer capable of calculating and outputting the results of input formulae in response to the input of data providing numerical values for numerical variables of a formula.
  • Prior art computers generally require a programme to be written in conjunction with each specific input formula in order for the operator to be prompted to input numerical values corresponding to the numerical variables of the formula.
  • One such computer is described in GB 2,125,589.
  • the calculator provides a facility for adding to or overwriting the prompt characters.
  • an electronic computer comprising means for inputting and storing formulae that include numerical variables, means for inputting numerical values of the numerical variables, means for executing automatic computation in accordance with the stored formula and said input numerical values, and means for displaying the result of said computation, characterised in that the electronic computer comprises means for automatically prompting input of the numerical values of said numerical variables to enable the computation means to compute said result.
  • the computer may also comprise means for distinguishing the numerical variables in the input formula, and display control means.
  • the display control means may cause the display means to display the names identifying the numerical input variables and a name identifying the computational result in a table with the corresponding input numerical values and the value of the computational result, respectively.
  • the computer may also comprise means for inputting a character term so that the display means displays a name identifying the character term.
  • the characters distinguishing a particular set of input data may then be displayed in table format along with the corresponding numerical variables.
  • the electronic computer is designed to display names identifying the input and output variables of a formula, along with numerical values representative of these variables, in table formation.
  • the computer also recognises character terms incorporated in an input statement and provides a character writing column in the table.
  • the character writing term allows identifying information to be output along with a set of numerical values used in computation of a formula.
  • FIG. 1 is a simplified schematic diagram of an electronic computer incorporating the preferred embodiments of the present invention.
  • a display unit 1 comprises of liquid crystal display elements.
  • the control circuit 2 controls the character display and the illumination of symbol segments of display 1.
  • the key input unit 3, receives key strobe signals from input/output port 4 and outputs the key-return signal to a microprocessor unit (MPU) 5.
  • MPU microprocessor unit
  • RAM Read-write memory
  • ROM read-only memory 7
  • a connector 8 joins RAM and ROM as modules; these memory means and connectors are also connected to the MPU 5 via data bus 10, address bus 11, and control bus 12.
  • Another connector 9 joins the I/O devices of tape recorders, printers and other memory means, while this connector is also joined to MPU 5 by means of the above-mentioned buses 10, 11, and 12.
  • I/O port 4 outputs strobe signals to the key input device 3, and simultaneously delivers and receives clock data to and from clock circuit 13.
  • I/O port 4 also outputs drive signals to drive circuit 14 of buzzer 15.
  • MPU 5 outputs a synchronising signal HA and a display ON/OFF signal DISP to a display controller 22.
  • the MPU 5 also outputs backplate signals H0 through H14 to the display unit 1.
  • the display controller 2 incorporates a display memory corresponding to each of the segments of the display 1. Characters and symbols can be displayed on the display unit 1 by writing bit-patterns to the display memory that correspond to desired patterns.
  • Figures 2 to 5 show the operation flowcharts for analysing an input statement that may include a formula and independent display order inputs. These flowcharts describe system operations that allow the order of display of particular numerical variables to be specified as well as analysing a formula to distinguish the variable denoting the result of the computation and the numerical variables whose values must be input to enable computation to be effected.
  • the format of the input statement and the layout of the display table are determined in accordance with the following rules embodied in the flow charts of Figures 2 to 5.
  • the letter A indicates the character term column.
  • This column can be used to provide information on a product, that may represent, for example, an apple (abcd) or an orange (efg).
  • abcd apple
  • efg orange
  • a formula can be computed only after an input statement is analysed into interim words, the formula structure checked, the relevant tables generated with the names of numerical variables and character terms, input of the required data for computation of the formula prompted and the required numerical values of variables input.
  • step S4 it is determined whether the character is anything other than an alphabetical or a Japanese character. If it is, an error mode is entered.
  • the first character is the name of a numerical variable
  • a flag denoting the presence of a numerical variable on the right hand side of the formula is reset at step S6.
  • the name of the numerical variable (B) is stored in the memory temporarily at step S7.
  • the pointer is set to the specific character that follows the name of the variable, in this case a colon.
  • the MPU 5 checks to see if the specific character EQUAL is identified at step S9. If the EQUAL is identified, the MPU 5 recognises the start of a formula or equation, causing operation to proceed to terminal 2 of Figure 4. If the EQUAL is not identified, as with our present example, the system operation proceeds to step S10.
  • step S10 A determination is made at step S10 as to whether the name of the variable (B) stored temporarily in the memory at step S7 is already present in the table. If the variable is already stored in the table the order specifying commands must have been duplicated, and an error is therefore indicated. If the name of the variable is not present in the table as determined at step S10 and no error is identified, data signals are then sent to terminal 1 of Figure 3 and the process continues. At step S13 the name of the variable is stored in the table, and the operation proceeds to step S15. If at this stage the pointer position indicates a colon, as it would in the present example, the system operation returns to point 5 of Figure 2 to allow continuation of the process. If instead a CR is detected at step S16 this indicates the end of an input statement, and processing is completed. If the character indicated by the pointer is neither a colon nor a CR, an error is indicated.
  • step S15 the input continues with a colon, this is determined at step S15 and the process returns to step S3 where the next variable is checked to see if it is surrounded by quotation marks.
  • the pointer then indicates the "A".
  • step S3 the process proceeds, therefore, to step S11 where the name of the variable is read into the memory.
  • the system operation then transfers to point 4 of Figure 3 where a checking operation is executed at step S17 to see if the name of this variable is already present in the table.
  • step S18 If its presence is not identified and no error is accordingly detected, the name of this variable is stored in the table at step S18. Finally, double-quotation marks, designating a character term, are applied at step S19. The system operation then proceeds to step S19a and the pointer is advanced again by one position. The system operation continues with S15 and saves the names of order specifying characters separated by colons until an EQUAL sign is detected at S9.
  • step S19 the system proceeds to S19a, S15, S3 to S9 where an EQUAL is detected.
  • the result variable (C) is then stored temporarily in the memory at step S7.
  • step S20 of Figure 4 the pointer position is then advanced by a further position. If the pointer indicates any numeral, the MPU 5 reads this numeral into the memory at step S22 and causes the pointer to proceed to the following position. In the present example the operation proceeds directly from step S21 to step S23.
  • the MPU 5 checks at step S23 whether the character indicated is either an alphabetical character or a Japanese character.
  • this character is read into the memory at step S24, and a flag is set at step S25 that indicates the presence of a variable on the right-side of the equation. If the name of the variable D has not already been included in the input to specify its position prior to the formula as is the case in this example, that is, its name is found to be absent from the table at step S26, the name of the variable is stored in the table at step S27 and the operation returns to step S20, where the pointer is advanced and the next character examined. In the present example the character is a plus sign (+). As step S23, therefore, a name of a variable is not identified. The presence of a colon or a CR is therefore, sought at steps S28 and S30 respectively.
  • step S29 If a colon or CR is present, the end of a formula is indicated and the operation proceeds to point 3 of Figure 5. If an EQUAL character is identified at step S29, this must mean that two EQUALs are present in an equation, and the error mode is activated. If neither a colon nor a CR is present, as in the present example, the system operation returns to step S20 and the system proceeds to look at the next character.
  • step S28 or step S30 the system operation then proceeds to step S31 of Figure 5.
  • step S31 of Figure 5 whether or not the flag denoting the presence of a variable on the right-side is reset is determined. If this flag has been reset, the system did not pass through step S25 prior to a determination of the end of the formula and there was therefore no numerical variable present on the right-hand side of the input formula. An error determination is made accordingly.
  • step S36 the MPU 5 identifies whether the character that precipitated entry to terminal 3 was a CR as opposed to a colon. If the previous character was a colon, the input statement still continues and the system operation returns to step S33 to allow further information to be entered.
  • the MPU 5 After analysing the input statement, the MPU 5 extracts each named numerical variable stored and then determines the names and nature of the numerical variables and character terms positions, as shown in Table 1.
  • Figure 6 shows some typical examples of display and key operations for inputting data after the entry and analysis of a designated input statement.
  • the cursor is displayed below the first numerical variable (B) as shown in Figure 6(a).
  • numeral 1 as the value of (B) shown in Figure 6(b)
  • this value appears under the first variable at Figure 6(c).
  • the cursor moves to the second position shown in Figure 6(d) indicating the character term (A). If the character array abcd is input to identify this particular set of input data, abcd appears beneath the second character variable.
  • the cursor moves to the third position (D), allowing the entry of a numeral designating the desired value of (D).
  • FIGS 7 and 8 are flow charts showing the processes effected in response to entry of the return key after completion of entry of the data necessary for computation of a formula. The details are described below.
  • the MPU converts the equation into interim words to be stored as an equation.
  • the pointer is set to the foremost position of the equation. Beginning with the first code a determination is made as to whether the given code is identified as a double-quotation, an alphabetical character or even a Japanese character at steps M2, M3 and M4 respectively.
  • the MPU 5 then reads the name of the variable before advancing the pointer position to the next code of the input statement. If this code is identified to be an EQUAL code, the name of the preceding variable is stored in the memory at step M9 to make up the left-hand side of the equation, and the pointer is moved forward (M ⁇ 1 ⁇ M9 ⁇ M10).
  • step M11 The next code is then analysed at steps M11, and/or M12. If this code is a function or operator the system operation proceeds to step M14 when the operation is executed. If, however, the code denotes either an alphabetical character or a Japanese character at step M12, the table is checked by the MPU 5 at step M15 to determine the position in which the variable belongs with reference to the term name table, Table 1, generated on analysis of the input statement.
  • step M16 the system operation reads the numerical value for the given variable from the data array of Table 2. If the required data is not present in the data array of Table 2 this is detected at step M21 and the system operation proceeds to step M22 where the pointer is advanced to the end of the equation.
  • step M6 the presence of a colon is detected. The process is completed if no colon is detected and the system proceeds to step M7 where a CR is detected. If a colon is detected at M6 the operation continues at M8 where the pointer is advanced and steps M2 to M4 repeated to look for further characters.
  • step M21 if data is found in Table 2 corresponding to a desired numerical variable, the numerical value is rewritten and the designated computation executed in accordance with specific functions and operators (M18 ⁇ M14 ⁇ M10 ⁇ M11). After the final operation has been executed the result of the computation is obtained. At this stage the N branch will be taken at each of M11, M12 and M13 and the operation proceeds to M19.
  • the MPU 5 detects at step M19 with reference to Table 1, the position of the left-side term which was stored temporarily at step M9. The result of computation is written to the corresponding position of Table 2 at step M19.
  • step M6 where the CR (carriage return) present at the rear end the equation will result in completion of the entire operation at step M7.
  • the input statement may include a formula or equation including a number of numerical variables required for computation.
  • the preferred embodiment also enables an input statement including only positioning information, that is no formulae or equations, to generate a display table. This can be achieved by an input statement containing only the character terms "NAME”, "ADDRESS”, and "TELEPHONE NUMBER” for example.
  • the desired data can then be accessed from a table using an indexing operation merely by referring to the designated character row. This offers the possibility of another advantage for use of this embodiment of the invention as an electronic address and telephone directory.
  • the described electronic computer embodying the present invention incorporates unique functions including the capability of assuming that the variables in a formula present in an input statement are numerical variables, prompting input of numerical values necessary for computation of the formula and then, on entry of the necessary data corresponding to the numerical variables in response to the prompts, allowing the result of the computation (output terms) to be displayed together with the input numerical values.
  • the electronic computer also allows entry of character data so that each set of numerical values for computation of a formula can be independently displayed.
  • An advantageous additional facility of this embodiment allows the optional rearrangement of the displayed variables through the inclusion of positioning information in an input statement. As a result, the display content can be presented in a plurality of arrangements as desired.

Claims (7)

  1. Elektronischer Rechner mit einer Einrichtung zum Eingeben und Speichern von Gleichungen, die Zahlenvariablen beinhalten, einer Einrichtung (3) zum Eingeben von Zahlenwerten für die Zahlenvariablen, einer Einrichtung (5) zum Ausführen einer automatischen Berechnung gemäß der abgespeicherten Gleichung und den eingegebenen Zahlenwerten und einer Einrichtung (1) zum Anzeigen des Ergebnisses der Berechnung, dadurch gekennzeichnet, daß der Rechner eine Einrichtung zum automatischen Ausgeben einer Aufforderung zum Eingeben der Zahlenwerte für die Zahlenvariablen aufweist, um die Berechnungseinrichtung in die Lage zu versetzen, das Ergebnis zu berechnen.
  2. Elektronischer Rechner nach Anspruch 1, mit einer Einrichtung zum Erkennen der Zahlenvariablen in der eingegebenen Gleichung und mit einer Anzeigesteuereinrichtung, welche die Anzeigeeinrichtung veranlaßt, die Bezeichnungen zur Kennzeichnung der Zahlen-Eingabevariablen sowie des Berechnungsergebnisses in einer Tabelle zusammen mit den jeweils eingegebenen Zahlenwerten bzw. dem Wert des Rechenergebnisses anzuzeigen.
  3. Elektronischer Rechner nach Anspruch 2, bei dem die Anzeigeeinrichtung (1) eine Einrichtung zum Darstellen der Bezeichnungen der Zahlenvariablen in einer Reihenfolge aufweist, die unabhängig ist von der Reihenfolge ihres Auftretens in der eingegebenen Gleichung.
  4. Elektronischer Rechner nach einem der Ansprüche 1 bis 3, mit einer Einrichtung zum Eingeben eines Zeichenterms, wobei die Anzeigeeinrichtung so betrieben werden kann, daß sie eine Bezeichnung anzeigt, die den eingegebenen Zeichenterm kennzeichnet.
  5. Elektronischer Rechner nach Anspruch 4, mit einer Einrichtung zum Eingeben von Zeichen, die dem Zeichenterm entsprechen, wobei die Anzeigeeinrichtung so betrieben werden kann, daß sie die Zeicheninformation anzeigt.
  6. Elektronischer Rechner nach Anpsruch 5, bei dem die Anzeigeeinrichtung so betrieben werden kann, daß sie die den Zeichenterm kennzeichnende Bezeichnung und die entsprechenden Zeichen in der Tabelle anzeigt.
  7. Elektronischer Rechner nach Anspruch 2, bei dem die Erkennungseinrichtung auch eine Einrichtung zum Erkennen von Kommentarinformationstermen und eine Einrichtung zur Aufforderung der Eingabe von Zeichen aufweist, die den jeweiligen Zeichentermen entsprechen.
EP85306652A 1984-09-18 1985-09-18 Elektronenrechner Expired - Lifetime EP0175579B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP197621/84 1984-09-18
JP59197621A JPS6174054A (ja) 1984-09-18 1984-09-18 電子式計算機

Publications (3)

Publication Number Publication Date
EP0175579A2 EP0175579A2 (de) 1986-03-26
EP0175579A3 EP0175579A3 (en) 1988-07-20
EP0175579B1 true EP0175579B1 (de) 1992-11-19

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EP85306652A Expired - Lifetime EP0175579B1 (de) 1984-09-18 1985-09-18 Elektronenrechner

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EP (1) EP0175579B1 (de)
JP (1) JPS6174054A (de)
DE (1) DE3586839T2 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4845652A (en) * 1986-05-29 1989-07-04 Hewlett-Packard Company Generic equation solver interface for solving mathematical equations
DE3750525T2 (de) * 1986-06-17 1995-06-01 Sharp Kk Datenverarbeitungseinrichtung zur Verwendung in statistischer Berechnung.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56153468A (en) * 1980-04-30 1981-11-27 Casio Comput Co Ltd Changing system for input data of minicomputer
JPS58192144A (ja) * 1982-05-05 1983-11-09 Sanyo Electric Co Ltd ワ−ドプロセツサ
DE3325153A1 (de) * 1982-07-12 1984-01-12 Sharp K.K., Osaka Programmierbarer elektronischer rechner

Also Published As

Publication number Publication date
JPH053616B2 (de) 1993-01-18
DE3586839D1 (de) 1992-12-24
EP0175579A3 (en) 1988-07-20
EP0175579A2 (de) 1986-03-26
JPS6174054A (ja) 1986-04-16
DE3586839T2 (de) 1993-06-09

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